TDG Gold Unlocks Deep Copper Treasure Below Historic BC Mine

VANCOUVER, BC – February 23, 2026 – Deep beneath the silent, forest-covered slopes of British Columbia's Anyox Peninsula, a modern exploration campaign has resurrected the ghost of a legendary mine. TDG Gold Corp. today announced the discovery of a significant new zone of high-grade copper mineralization, located hundreds of metres below the historic workings of the Hidden Creek Mine, which last saw production during the Great Depression.

The discovery, dubbed the '4300 Zone', was confirmed by a powerful drill intersection that has ignited excitement about the potential for a major district revival. Drill hole ANY-25-002 intercepted a broad 25.08-metre interval of massive sulphides grading an impressive 2.1% copper equivalent, a figure that includes valuable byproducts of zinc, gold, silver, and cobalt. This find validates a new geological model and suggests a much larger mineralized system may lie waiting in the depths.

Echoes of a Bygone Era

The Anyox district is steeped in mining history. The original Hidden Creek Mine, discovered in 1901, was a behemoth of its time. From 1914 to 1935, the Granby Consolidated Mining, Smelting and Power Company processed nearly 22 million tonnes of ore, producing over 320,000 tonnes of copper. But when the economic turmoil of the Great Depression made operations untenable, the mine was shuttered, its vast potential below the final 300-metre working level left untouched and largely untested for nearly a century.

TDG Gold's success stems from applying 21st-century technology to this historic ground. In 2025, the company deployed a deep-penetrating electromagnetic (EM) geophysical survey, a tool that functions like a high-tech metal detector capable of peering deep into the earth's crust. The survey identified a large, highly conductive anomaly far below the old mine—a tantalizing signature that demanded a closer look.

Following a methodical process of extending older drill holes to refine the geophysical target, the company aimed its drill bit at the heart of the anomaly. The result was discovery hole ANY-25-002, which hit the polymetallic massive sulphide lens at a vertical depth of 900 metres. The discovery confirms the presence of rich mineralization 700 metres down-dip from the lowest historical mine workings.

“The discovery of the 4300 Zone confirms the broader potential of the Anyox District beyond the historic Hidden Creek Mine,” said Fletcher Morgan, CEO of TDG Gold. “Our disciplined, methodological, capital-efficient exploration strategy has allowed us to rapidly advance this target while maintaining a strong treasury.”

Decoding a Deep-Seated System

Geologically, the 4300 Zone is classified as a Besshi-type volcanogenic massive sulphide (VMS) deposit. These deposits form on the ancient seafloor from metal-rich hydrothermal vents and are known for their copper-dominant nature, often occurring as extensive, tabular lenses. The presence of copper, zinc, gold, silver, and cobalt in the 4300 Zone is a textbook characteristic of this deposit style.

Crucially, geologists interpret the initial drill intersections as potentially representing the outer halo of a much larger mineralized body. In many VMS systems, the core of the lens is the richest in copper, surrounded by a halo where zinc becomes more abundant. The current drill holes, including an earlier hole, ANY-24-003, which hit a thinner 5.38-metre section 80 metres away, show a progression in thickness and grade that suggests the company is drilling into the edge of a more substantial system. The geophysical models support this, outlining conductive plates measuring up to 400 by 200 metres.

The ultimate prize for explorers in this environment is the discovery of a 'feeder zone'—the primary conduit through which the metal-rich fluids originally traveled. These zones are often indicative of the very core of a deposit and have not yet been identified by drilling at the 4300 Zone. For scale, the primary No1 Lens at the original Hidden Creek Mine measured an enormous 500 by 400 metres and was up to 75 metres thick, highlighting the potential prize TDG is chasing.

A Critical Find in a Prolific Region

The discovery's significance extends beyond the Anyox Peninsula. The project is located in British Columbia's famed “Golden Horseshoe,” or Golden Triangle, a region renowned for its world-class mineral deposits, including Red Chris, Eskay Creek, and Galore Creek. The 4300 Zone discovery underscores the area's continued prospectivity, particularly for metals deemed critical for the global energy transition.

Copper is essential for electrification and renewable energy infrastructure, while cobalt is a key component in batteries for electric vehicles. The multi-metal nature of the 4300 Zone positions it as a potential future source for a basket of these strategic commodities. Furthermore, the project benefits from a significant logistical advantage: tidewater access. This allows for year-round exploration and would dramatically reduce transportation costs for any future mining operation compared to more remote, land-locked projects.

Following the news, TDG Gold's stock saw a notable increase, reflecting investor optimism. The company is well-funded and plans to immediately follow up on its success. Geophysical crews are already performing downhole surveys on the new drill holes to further refine the geometry of the conductive plates. This data will guide the next phase of drilling, which is set to resume in March 2026 after a logistical resupply. With the 4300 Zone open for expansion in all directions, the next few months will be pivotal in determining whether this deep discovery is the key that unlocks a new mining camp in a district long thought to have told its final tale.